I've been living without NNW for two days now.  I've got the old Powerbook wiped and ready for delivery and my server Mac doesn't run MacOS X, so I'm back to using Radio's aggregator.  There are plenty of things to like and dislike about it.  Mainly:  grouping and layout are dislikes, display of posts, inline content and comment links are likes.  Still trying to fix it myself, but failing due to lack of education.  I'm reading Matt's book, too.  Patience, I tell myself.